Veterinary-surgeon&#39;s forceps.



b UNITED. STATES .Patented June 28, 1904.

PATENT FFEQE.

JOHN F. HEMPHILL, OF ARLINGTON, OREGON, ASSIGNOR OF ONE-HALF TO ALBERTB. HEMPHILL,

OF BROUGHTON, KANSAS.

VETERINARY-SURGEONS FORCEPS- SPECIFICATION forming part of LettersPatent No. 763,396, dated June 28, 1904.

Application filed January 15, 1904. Serial No. 189,091- (No model.)

To (all whmn/ifi may concern:

Be it known that I, JOHN F. HEMPHILL, a citizen of the United States,residing at Arlington, in the county of Gilliam and State of Oregon,have invented certain new and useful Improvements in Veterinary-SurgeonsForceps, of which the following is a specification.

My invention relates to improvements in veterinary-surgeons forceps; andit consists in a device for automatically and firmly securing theforceps in its grip upon a tooth or other object desired to be held, andyet admitting of its being readily released therefrom when desired. Iattain these objects by means of the device hereinafter described, andillustrated in the accompanying drawings, in which- Figure 1 is a viewin perspective of a pair of molar-forceps equipped with my device; Fig.2, a detached face view of the ring used in locking the engaged forceps;Fig. 8, a side view of same; Fig. 4, a detail view of the outer end ofhandle A; Fig. 5, a detail view of the rod or bar C, illustrating thecorrugated surface of same and the flattening of the surface where therod is engaged by the outer end of the handle B; and Fig. 6, a detailview of the outer end of said handle B.

Similar letters of reference indicate like parts throughout the severalviews.

The outer end of the handle A is grooved. on the inner side, as shown inFig. 4, for admission of shank & of the ring a, the outer side of saidhandle at its end forming a shoulder (Z, preventing said ring-shank,which is pivoted at c, from swinging outward. The bar or rod C is soflattened at c, Fig. 5, as to fit within the slot g in end of handle B,(shown in Fig. 6,) said bar being pivoted to said handle at f andextending through .said ring a. The hole in said ring being slightlylarger than said bar permits free play thereof upon said bar when theshank b is held at approximately right angles therewith, but the naturalspring of said handles causing said ring to firmly grip said bar whensaid handles are released, the said groove then allowing said ring fromits friction upon the rod to swing to an oblique anglewith said bar andfirmly 5 grip the same. The outer surface it of said bar is somewhatroughened or corrugated crosswise thereof to assist said ring insecuring such grip.

To operate the forceps equipped with my device, the forceps are placedin contact with the object it is desired to hold, the handles pressedtogether as closely as may be and then released, when it will be foundthat said ring by its firmgrip upon said rod will firmly I lock saidforceps in its hold upon such object. To release the hold of saidforceps, it is only necessary to again'press inward on the handles andhold the ring back against said shoulder d, when it will be found thatring a 5 may be easily slipped outward on said bar, thus allowing of theseparation of the handles and consequent release of the jaws from theobject held. A similar appliance might be used conjunctively at the endof each of said 7 handles, and instead of the groove d in the handle thering-shank 6 might be enlarged and provided with a groove similar tothat described, while the end of the handle would be reduced to fitwithin said groove and pivoted therein, and even without any groovewhatever said shank might be attached to said handle by'aconnecting-link, so as to swing back against the end of said handle inlieu of the shoulder d; but I consider my construction as describedsimpler and more effective for the objects desired to attain.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is- 5 1. In a device of the characterdescribed, a dental forceps having a pair of pivoted'arms, one of saidarms having a cut-out portion in its lower end and oppositely-disposedapertures formed therein, a ring having a flattened 9 shank adapted toenter said cut-out portion, means for pivotally securing the shankwithin the said cut-out portion passing through said shank and theapertures in the arm,,and a pivotally-supported bar carried by the otherarm having a roughened portion adapted to enter said ring, substantiallyas set forth.

2. In combination with a dental forceps comprising twopivotally-connected arms, one the arms, substantially as and for thepurpose of the arms being recessed upon its inner, described. 10 lowerface, a ring member having a shank Intestimony whereof I have affixed mysigadapted to lie in said recess and being pivnature in presence of twoWitnesses.

5 otally secured to the arm therein, means for JOHN F. HEMPHILL.

limiting the outward movement of the ring, Witnesses: and a barpivotally mounted on the other arm WV. 0. SMITH,

adapted to engage within the said ring to lock J. C. FoWLIE.

